We use some essential cookies to make this website work.
We’d like to set additional cookies to understand how you use forestresearch.gov.uk, remember your settings and improve our services.
Preparing to search
Biotic factor that contributes to oak decline
In the first recorded episode of oak decline in Britain in the 1920s, Armillaria (honey fungus) was visible on many of the affected trees but opinions varied on whether it was the primary cause of decline or not.
One school of thought claimed that honey fungus was one of the most dangerous factors involved whilst others thought that its principal role was to kill off trees that were already irretrievably damaged.
Our current knowledge about Armillaria suggests that the latter is much more likely, and in general the UK's native oaks are not particularly susceptible to this pathogen, even the more aggressive species of Armillaria. However, there is little doubt that oaks showing symptoms of decline can be invaded by Armillaria.
Cookies are files saved on your phone, tablet or computer when you visit a website.
We use 3 types of cookie. You can choose which cookies you're happy for us to use.
These essential cookies do things like remember your progress through a form. They always need to be on.
We use Google Analytics to measure how you use the website so we can improve it based on user needs. Google Analytics sets cookies that store anonymised information about: how you got to the site the pages you visit on forestresearch.gov.uk and how long you spend on each page what you click on while you're visiting the site
Some forestresearch.gov.uk pages may contain content from other sites, like YouTube or Flickr, which may set their own cookies. These sites are sometimes called ‘third party’ services. This tells us how many people are seeing the content and whether it’s useful.